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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
QuickLoad over bore weighting factor formula?
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<blockquote data-quote="Deleted member 46119" data-source="post: 1397417"><p>Yes indeed. That has been a "challenge" for many QL users since forever.</p><p></p><p>I only took von der Walt's work and extrapolated into a formula that <strong>MAY</strong> be useful to QL users. Using van der Walt's numbers I got much closer to the expected velocities and pressures as checked against a Magneto Speed and Pressure Trace II.</p><p></p><p>Optimal Barrel Time predictions vs. real accuracy are also much closer.</p><p></p><p>Example: I just redid my 260 Remington load for 147 ELD-Ms. Without ever firing a shot, I was dead on velocity, no pressure trace this time but the "signs" match the QL chart. Barrel time was not actually measured since the Pressure Trace II was not used, however. I made a batch of ammo with one charge weight. Shot it. Accuracy is better than I am. Say in the .2s at 100 yards off a bench, bipod and rear bag.</p><p></p><p>For me, it works. Your Mileage May Vary. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="Deleted member 46119, post: 1397417"] Yes indeed. That has been a "challenge" for many QL users since forever. I only took von der Walt's work and extrapolated into a formula that [B]MAY[/B] be useful to QL users. Using van der Walt's numbers I got much closer to the expected velocities and pressures as checked against a Magneto Speed and Pressure Trace II. Optimal Barrel Time predictions vs. real accuracy are also much closer. Example: I just redid my 260 Remington load for 147 ELD-Ms. Without ever firing a shot, I was dead on velocity, no pressure trace this time but the "signs" match the QL chart. Barrel time was not actually measured since the Pressure Trace II was not used, however. I made a batch of ammo with one charge weight. Shot it. Accuracy is better than I am. Say in the .2s at 100 yards off a bench, bipod and rear bag. For me, it works. Your Mileage May Vary. ;) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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QuickLoad over bore weighting factor formula?
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